Electromagnetic flowmeter is a high precision and high reliability product which has been constantly upgraded and improved. The flowmeter has reached the high level in excitation technology, lining technology and intelligent technology.Electromagnetic flowmeter is suitable for measuring the volume flow rate of acid, alkali, salt solution, mud, pulp, waste water and other conductive media.

The fault of the electromagnetic flowmeter in operation is the fault of the instrument itself, that is, the fault caused by the damage of the instrument structure or components.Another type of fault is caused by external causes, such as improper installation, flow distortion, deposition and scaling.

There are bubbles in the liquid of electromagnetic flowmeter:

The formation of bubble bubbles in liquid can be divided into two ways: inhalation from the outside and conversion of dissolved gas (air) in the liquid into free bubbles.If there are large bubbles in the liquid, the whole electrode can be covered when passing through the electrode, making the flow signal input circuit open instantaneously, resulting in the output signal shaking.

And the easy way to tell is when you have a sloshing.Cut off the current of the excitation loop of the magnetic field. If the instrument is still displayed and unstable at this time, it is mostly due to the influence of bubbles.If the electrode resistance is measured with a pointer multimeter, it can be measured that the circuit resistance of the electrode is higher than normal.For the case of air in the measured medium, if it is judged to be caused by the installation position, for example, if the electromagnetic flowmeter is installed at the high point of the piping system and the gas is stored or the external air is inhaled, it is a quick solution to change the installation position.However, many applications are larger diameter or installation position is not easy to change.

It is recommended to install an air bag and an exhaust valve upstream of the flow, and a solenoid flowmeter. The displayed wobble due to bubbles can be up to 20%~50%. After installing the exhaust device, the measurement will return to normal.

Related products: Liquid turbine flow meter, ultrasonic flow meter, vortex flow meter.